2 month old

Kennedy • I had my my sweet little boy on 11/08/18 🏈💙 I’m engaged to a very loving man and I had our sweet girl on 10/21/20

His poop is a dark green almost black seedy and watery.. I called his dr and she told me to switch between pedialite and his formula every feeding and if his poop is still watery tomorrow then call them back my question is has anyones baby had watery poop and wamhat was it from?